ApiQueryDeletedRevs has been deprecated since MediaWiki 1.25. https://logstash.wikimedia.org/goto/c6b7fd86fefc899a0d929dcbaef59386 shows few users remain, so we should be good to start the process of removing it (which would mean we won't have to worry about fixing it for MCR Revision-class deprecations).
- Notify the operator of the one bot using the module.
- Identify user scripts used by the top users.
- Fix those scripts or notify their maintainers.
- Schedule removal version.
- Announce pending removal (to mediawiki-api-announce and User-notice).
- Perform removal.